Police have arrested the assailant who allegedly bashed two men in the head with a metal baseball bat in separate random attacks in Queens — that left one of the victims blind, the NYPD said.

Matthew Lloyd, 36, was charged with attempted murder and assault for the back-to-back attacks in Astoria on Aug. 19, according to cops and prosecutors.

The first victim was near Astoria Park with his girlfriend at around 6:10 p.m. when Lloyd, who was on a skateboard, allegedly smacked him in the back of the head with an orange bat, knocking him unconscious, authorities said.

“The victim hears a loud bang, feels pain, the next thing you know he wakes up in the hospital. He doesn’t really know what happened,” NYPD Assistant Chief Joseph Kenny told reporters Tuesday.

“Thank God his girlfriend witnessed it and gave us a good description,” he added. 

The victim was taken to Elmhurst hospital and treated for a hematoma to his left ear and a laceration to the forehead, Kenny said. 

Surveillance footage showed the suspect dropping the bat in a nearby garbage can as he fled, cops said.

But he then allegedly went back for the bat just about 10 minutes later — after noticing his next victim, a 79-year-old man standing on the sidewalk near 19th Street and 20th Avenue, Kenny said. 

“He goes back, retrieves the bat, and —unprovoked — just walks up and cranks this guy, starts beating him several times with this bat,” Kenny said. 

The victim was hit multiple times in the head and face and suffered fractures to his skull, eye socket, and face, prosecutors said.

He was taken to NewYork-Presbyterian/Weill Cornell Medical Center and underwent surgery in an effort to save his eye, according to prosecutors.

He remained hospitalized on Tuesday.

“He’s going to be blind. He going to lose sight in his in his eye,” Kenny said. 

Lloyd is also suspected in two other random assaults on elderly men in Midtown, Manhattan on Aug. 18, Kenny said.

The first victim was a 71-year-old man kicked while riding the N train, with an 80-year-old man punched in the head just five minutes later while walking near Central Park South, the police official said.

Police found Lloyd based on the description given by one of the victims’ girlfriends and photo arrays shown to victims, Kenny said.

Lloyd was also charged with two counts of criminal possession of a weapon for the Queens attacks.

“The randomness of the attacks is as frightening as their brutality,” Queens District Attorney Melinda Katz said in a statement. “As a city, we cannot concede our neighborhoods to those who would randomly attack. The defendant will be held to account for his alleged actions.”

Lloyd is due back in court on Friday.